{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Chemical", "Disease"], "input": "A comparison of individual selective and unselective cyclooxygenase inhibitors suggests substance - specific differences , which may depend on differences in pharmacokinetic parameters or inhibitory potency and may be contributed by prostaglandin - independent effects ."}
{"Chemical": ["cyclooxygenase inhibitors", "prostaglandin"], "Disease": []}